<!DOCTYPE html>
<html class="reftest-wait">
<title>View transitions: captured backdrop filter on the element animates</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
<link rel="author" href="mailto:vmpstr@chromium.org">
<link rel="match" href="backdrop-filter-animated-ref.html">
<script src="/common/reftest-wait.js"></script>
<style>
.box {
  background: green;
  width: 100px;
  height: 100px;
}
#target {
  view-transition-name: target;
  width: 50px;
  height: 50px;
  position: absolute;
  top: 20px;
  left: 20px;
  backdrop-filter: grayscale(1);
}
#target.after {
  backdrop-filter: grayscale(0);
}

html::view-transition-group(*) {
  animation-duration: 1s;
  animation-timing-function: linear;
  animation-play-state: paused;
}
html::view-transition-new(*) { animation: unset; opacity: 1; }
html::view-transition-old(*) { animation: unset; opacity: 0; }
</style>
<div class=box></div>
<div id=target></div>

<script>
failIfNot(document.startViewTransition, "Missing document.startViewTransition");

async function runTest() {
  let transition = document.startViewTransition(() => target.classList.add("after"));
  transition.ready.then(() => {
    requestAnimationFrame(() => requestAnimationFrame(() => {
      document.getAnimations().forEach((animation) => {
        animation.currentTime = 500;
      });
      requestAnimationFrame(takeScreenshot);
    }));
  });
}
onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest));
</script>
</html>
